/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

package com.badlogic.gdx.math.collision;

import com.badlogic.gdx.math.Vector3;

import java.io.Serializable;

/**
 * Encapsulates a 3D sphere with a center and a radius
 *
 * @author badlogicgames@gmail.com
 */
public class Sphere implements Serializable {
    private static final long serialVersionUID = -6487336868908521596L;
    /**
     * the center of the sphere
     **/
    public final Vector3 center;
    /**
     * the radius of the sphere
     **/
    public float radius;

    /**
     * Constructs a sphere with the given center and radius
     *
     * @param center The center
     * @param radius The radius
     */
    public Sphere(Vector3 center, float radius) {
        this.center = new Vector3(center);
        this.radius = radius;
    }

    /**
     * @param sphere the other sphere
     * @return whether this and the other sphere overlap
     */
    public boolean overlaps(Sphere sphere) {
        return center.dst2(sphere.center) < radius * radius + sphere.radius * radius;
    }
}
